package org.bouncycastle.asn1.x9;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERInteger;
import org.bouncycastle.asn1.DERObject;

public class DHPublicKey extends ASN1Encodable {
    private DERInteger y;

    public static DHPublicKey getInstance(ASN1TaggedObject obj, boolean explicit) {
        return getInstance(DERInteger.getInstance(obj, explicit));
    }

    public static DHPublicKey getInstance(Object obj) {
        if (obj == null || obj instanceof DHPublicKey) {
            return (DHPublicKey) obj;
        }

        if (obj instanceof DERInteger) {
            return new DHPublicKey((DERInteger) obj);
        }

        throw new IllegalArgumentException("Invalid DHPublicKey: "
                + obj.getClass().getName());
    }

    public DHPublicKey(DERInteger y) {
        if (y == null) {
            throw new IllegalArgumentException("'y' cannot be null");
        }

        this.y = y;
    }

    public DERInteger getY() {
        return this.y;
    }

    public DERObject toASN1Object() {
        return this.y;
    }
}
